Automatic glTF to glB conversion

[Qaomen]

Description Both *.gltf and *.glb (aka binary glTF) are supported, but the latter has a smaller size. We should automatically convert imported glTF files to glB to save on file size in level files.

Minimum Acceptance Criteria

• [ ] Models can be imported both as glTF and glB. (Redundant but should stay the same).
• [ ] Imported models that are of glTF file type should automatically be converted to glB and saved in the project file as such.

Is blocked by the following issues Blocked by #102

[Zemanzo]

Scrapping this issue, and instead opting to write a guide on best level-making practices (see #43)